CN110350891A - A kind of amplitude limiter circuit - Google Patents
A kind of amplitude limiter circuit Download PDFInfo
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- CN110350891A CN110350891A CN201910728876.0A CN201910728876A CN110350891A CN 110350891 A CN110350891 A CN 110350891A CN 201910728876 A CN201910728876 A CN 201910728876A CN 110350891 A CN110350891 A CN 110350891A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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Abstract
This application discloses a kind of amplitude limiter circuit, which includes: signal input part, signal output end, at least one switching tube and at least one control unit；Wherein at least one control unit is used to control the conducting and disconnection of at least one switching tube；At least one switching tube is exported after the powered down for holding received radiofrequency signal by signal output end for inputting a signal into the on-state.Amplitude limiter circuit disclosed in the present application realizes the reduction to signal receiving end signal power using the conducting and disconnection of power detector control FET, and switching tube can be used in the clipping device for manufacturing small size with series, parallel in amplitude limiter circuit.
Description
Technical field
This application involves the radio-frequency front-end integrated circuit techniques more particularly to one in radio communication and Radar Technology field
Kind amplitude limiter circuit.
Technical background
In the systems such as wireless communication, radar, electronic countermeasure, transmitter emits radio signal, and receiver receives wireless
Electric signal.Generally, the transmitter transmission power the big more is conducive to communicate and detect at a distance, and due to high sensitivity
Demand, the low-noise reception circuit of receiver front end be able to bear it is anti-burn power but very little, generally in 10-20dBm or so.
Therefore, there are mainly two types of situations will cause receiver damage, and a kind of situation is that the biggish interference signal of external power is straight by antenna
It receives and enters in receiver, if receiver prime does not have any safeguard measure, biggish interference signal will will be in receiver
Low noise burn, to cause the damage of receiver.Another situation is that using circulator as duplex in transmitting-receiving subassembly
When the scheme of device, since circulator isolation is limited, when antenna transmitting is excessive, it is logical that transmitter high-power signal drains to receiver
The power in road is too big, and receiver is caused to damage.In order to protect low noise constant power sensitive device, one is added usually before these devices
A limiter is protected.
Summary of the invention
The application's is designed to provide a kind of amplitude limiter circuit, and amplitude limiter circuit provided herein is conducive to optimization tradition
Amplitude limiter circuit, and then to show that low cost and high performance amplitude limiter circuit and its integrated component provide basis.
In order to solve the above technical problems, a kind of amplitude limiter circuit of disclosure herein, comprising: signal input part, signal be defeated
Outlet, at least one switching tube and at least one control unit；
At least one described control unit is used to control the conducting and disconnection of at least one switching tube；
At least one described switching tube holds the power of received radiofrequency signal to subtract for inputting a signal into the on-state
It is exported after weak by signal output end.
Amplitude limiter circuit disclosed in the present application is realized and is received to signal using the conducting and disconnection of power detector control FET
The reduction of end signal power, compared with the structure of traditional PIN-based diode, amplitude limiter circuit disclosed in the present application can pass through
Traditional silicon technology is realized, thus low in cost, suitable scale of mass production；Because of signal in amplitude limiter circuit disclosed in the present application
Input and output are not necessarily to capacitance, therefore the amplitude limiter circuit has excellent ESD performance；Due to amplitude limiter circuit disclosed in the present application
Middle switching tube can be with series, parallel, therefore the amplitude limiter circuit chip occupying area is small, can be used in the limiter for manufacturing small size
Part；Meanwhile because switching tube is able to maintain lesser capacitor in off-state, so that the amplitude limiter circuit insertion loss based on the application
It is small, very big with roomy but power capacity.
Detailed description of the invention
Fig. 1 discloses a kind of circuit diagram of amplitude limiter circuit according to some embodiments of the present application；
Fig. 2 discloses a kind of NMOS transistor as the amplitude limiter circuit of switching tube according to some embodiments of the present application
Circuit diagram；
Fig. 3 is disclosed a kind of provided using high-resistance device and voltage source and controls voltage according to some embodiments of the present application
Amplitude limiter circuit circuit diagram；
Fig. 4 discloses a kind of limit for providing using switch and voltage source and controlling voltage according to some embodiments of the present application
The circuit diagram of width circuit；
Fig. 5 discloses a kind of clipping for providing using power detector and controlling voltage according to some embodiments of the present application
The circuit diagram of circuit；
Fig. 6 according to some embodiments of the present application, disclose it is a kind of using diode and resistance as power detector
The circuit diagram of amplitude limiter circuit；
Fig. 7 according to some embodiments of the present application, disclose it is a kind of using coupler and diode as power detector
Amplitude limiter circuit circuit diagram；
Fig. 8 discloses a kind of amplitude limiter circuit for amplifying control signal using amplifier according to some embodiments of the present application
Circuit diagram；
Fig. 9 discloses a kind of circuit diagram using the concatenated amplitude limiter circuit of switching tube according to some embodiments of the present application；
Figure 10 is disclosed a kind of using the circuit diagram for switching concatenated amplitude limiter circuit according to some embodiments of the present application；
Figure 11 discloses a kind of electricity of amplitude limiter circuit using multiple switch pipe parallel connection according to some embodiments of the present application
Lu Tu；
Figure 12 discloses a kind of clipping electricity parallel with one another using two switching tube collection according to some embodiments of the present application
The circuit diagram on road；
According to some embodiments of the present application, the chip structure for disclosing a kind of amplitude limiter circuit based on the disclosure shows Figure 13
Example diagram；
Figure 14 according to some embodiments of the present application, show by the chip assembly for disclosing a kind of amplitude limiter circuit based on the disclosure
It is intended to；
Figure 15 according to some embodiments of the present application, survey by the amplitude limiting characteristic for disclosing a kind of amplitude limiter circuit based on the disclosure
Attempt.
Specific embodiment
The illustrative embodiments of the application includes but is not limited to a kind of amplitude limiter circuit.
The term for using those skilled in the art to generally use is described the various aspects of illustrative embodiments by the application,
Others skilled in the art are communicated to the essence that they work.However, be apparent to those skilled in the art
It is that the part of described aspect can be used to practice some alternate embodiments.For illustrative purposes, to provide to explanation
Property embodiment thorough understanding, specific number, material and configuration are illustrated.However, coming for those skilled in the art
It says it is readily apparent that alternative embodiment can be realized without specific details.In other cases, in order not to
Illustrative embodiments is caused to obscure, some well known features have been omitted or simplified.
Implementation to keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with attached drawing to the application
Example is described in further detail.
According to an embodiment of the present application, a kind of amplitude limiter circuit is disclosed.Fig. 1 is the circuit diagram of the amplitude limiter circuit.Specifically,
As shown in Figure 1, radiofrequency signal enters amplitude limiter circuit from input terminal, exported from output end.The practical function of switching tube can in circuit
To be equivalent to the switch being connected between input terminal 101 and output end 102 in figure 103, the conducting and disconnection of the switch are controlled
The control for the control voltage that unit 104 processed provides.When the control voltage that control unit 104 provides is smaller, switch 103 is disconnected,
High-impedance state is presented, has substantially no effect on the transmission of signal.After the control voltage that control unit 104 provides is more than preset threshold,
Switch 103 is connected, and low resistive state is presented, is equivalent to one and is parallel to small resistance, and the resistance is with control unit 104
The increase of the control voltage of offer and reduce, radiofrequency signal by the resistance to, substantially reduce the signal power of output.Cause
This, when the control voltage that control unit 104 provides is sufficiently large, the signal power of output can be limited in a safe range
It is interior.
In some embodiments, switching tube can be realized by field effect transistor (FET), specifically include junction field crystalline substance
Body pipe junction field effect transistor (Junction Field-Effect Transistor, JFET), high electron mobility crystal
It manages (High Electron Mobility Transistor, HEMT), metal-semiconductor field effect transistor (Metal
Semiconductor FET, MESFET) Metal-Oxide Semiconductor field effect transistor (Metal-Oxide-
Semiconductor Field-Effect Transistor, MOSFET) etc..
In some embodiments, using n type field effect transistor (N Metal-Oxide-Semiconductor Field-
Effect Transistor, NMOS FET) or p type field effect transistor (P Metal-Oxide-Semiconductor
Field-Effect Transistor, PMOS FET) realize above-mentioned switching tube.It is one realized using NMOS as shown in Fig. 2
A specific embodiment, when the control voltage that control unit 204 provides is less than the threshold voltage of switching tube 203, at switching tube 203
In off-state, it is equivalent to high-impedance state, is flowed through at this time without electric current, therefore radiofrequency signal can be passed through with filter with low insertion loss.Work as control
When the control voltage that unit 204 provides is greater than the threshold voltage of switching tube 203, switching tube 203 is in the conductive state, is equivalent to low
Resistance state, and the increase of control voltage that is provided with control unit 204 of the impedance of switching tube 203 and reduce, be equivalent to one
Voltage controlled current source.When the control voltage that control unit 204 provides is sufficiently large, switching tube 203 is fully on, is located at three poles
Area under control, conducting resistance is also sufficiently small, so that most of radiofrequency signal passes through resistance to ground, to realize that clipping acts on.
Furthermore, it is to be understood that in other embodiments, switching tube can also be realized by other transistors, do not limit herein
System.
In some embodiments, in circuit the control unit of switching tube there are many presentation mode.As shown in Fig. 3, high resistant
Device 304 (can be resistance, inductance or both combination) is connected between the first electrode of switching tube 303 and voltage source 305.It is real
Border application in, the impedance of high-resistance device 304 be typically much deeper than node 1. and node 2. between parasitic capacitance and node 1. and
Node 3. between parasitic capacitance impedance so that the voltage amplitude of node 1. is proportional to the voltage amplitude of node 2..Meanwhile high resistant
The impedance of device 304 is sufficiently large can to prevent radiofrequency signal from revealing by high-resistance device 304.As shown in Fig. 4, switch 404 connects
It connects between the first electrode and voltage source 405 of switching tube 403.When switch 404 is in the conductive state, the electricity of voltage source 405
Pressure is transmitted to the first electrode of switching tube 403, then disconnects switch 404, then the voltage of 403 first electrode of switching tube can
It maintains.Furthermore, it is to be understood that in other embodiments, control unit can also leading using other modes control switch pipe
Logical and closing, herein with no restrictions.
In some embodiments, voltage source can be replaced with power detector 505 shown in fig. 5.Power detector 505 1
The input terminal 101 of radiofrequency signal is terminated at, the other end is connected through high-resistance device 504 with switching tube 503.Power detector 505
It can detecte the power of the radiofrequency signal inputted by input terminal 101, and generate correspondingly DC voltage and carry out control switch pipe 503
On-off.When the RF signal power of input is smaller, the DC voltage that power detector 505 exports is 0 or output DC voltage
Very little, the output voltage are insufficient to allow switching tube 503 to be connected, and are equivalent to high-impedance state, therefore radiofrequency signal can be logical with filter with low insertion loss
It crosses.When the RF signal power of input is sufficiently large, the DC voltage that power detector 505 exports is more than the threshold of switching tube 503
Value, makes that switching tube 503 is in the conductive state and conducting resistance is sufficiently small, and the radiofrequency signal largely inputted at this time is arrived by resistance
Ground, thus the signal power for reaching output end 102 is reduced.It the use of 505 advantage of power detector is the control that control unit provides
Voltage processed changes with the variation of the RF signal power of input, and input radio frequency letter can be monitored in real time in entire amplitude limiter circuit
Number power, so that switching tube 503 is in high resistant or low resistive state according to the watt level of input radio frequency signal, to reach clipping
Purpose, the control voltage value that whole process is provided without manual setting control unit.
In some embodiments, there are many implementations for power detector.As shown in Fig. 6, power detector 605 is by one
A diode 606 and a resistance 607 are constituted.606 anode of diode connects in input terminal 101, and 606 cathode of diode is connected to high resistant
One end of device 604.607 1 end of resistance is connected to 606 cathode of diode, other end ground connection.When the radio frequency letter that input terminal 101 inputs
When number power is smaller, diode 606 is insufficient to allow to be connected, diode 606 is in high-impedance state, corresponding control switch pipe 603
Control voltage very little, be insufficient to allow switching tube 603 to be connected, therefore radiofrequency signal can be passed through with filter with low insertion loss.When input radio frequency is believed
Number power it is larger when, diode 606 begins to turn on and rectifies to input radio frequency signal, generate a direct current signal, should
Direct current signal increases as input radio frequency power increases.When input radio frequency signal power is sufficiently large, what diode 606 generated
Direct current signal is enough that switching tube 603 is connected, and conducting resistance is sufficiently small, and most of radiofrequency signal is arrived by resistance 607 at this time
Ground.But the shortcomings that structure, is first is that the parasitic capacitance of diode 606 will affect the Insertion Loss of amplitude limiter circuit, second is that diode 606 is straight
It connects in input terminal 101, when the power of input radio frequency signal is very big, diode 606 is easy to burn.It is one as shown in Fig. 7
Kind improves the power detector 705 of structure, which includes diode 706, resistance 707 and power coupler 708.Power coupling
Device 708 is arranged near input terminal 101, and the size of coupling amount is depending on the characteristic of the diode 706 of selection.Diode 706
Effect it is identical as the effect of diode 606 in attached drawing 6, the coupling amount of power coupler 708 is suitable, to the Insertion Loss of amplitude limiter circuit
It influences smaller.Meanwhile because the signal power coupled by power coupler 708 will be much smaller than the power of input section 101, two
Pole pipe 706 is also not easy to burn because electric current is excessive.The shortcomings that structure is that power coupler 708 is coupled to diode 706 in attached drawing 7
Power it is often smaller, diode 706, which is difficult to detect a biggish direct current signal, is connected switching tube 703.Attached drawing 8 is shown
Another improve structure power detector 805, the structure on the basis of 705 structure of power detector, diode 806 with
An amplifier 809 is connected between high-resistance device 804, the effect of amplifier 809 is first is that the direct current that diode 806 is examined is believed
Number amplify so that switching tube 803 can be connected realization clipping as early as possible, i.e., reduction amplitude limiter circuit rise ration the power supply it is flat, second is that enhancing
Driving capability, to reduce response recovery time.
In some embodiments, in certain special processes, such as SOI technology, high resistant silicon technology, more trap CMOS technologies or arsenic
Change gallium technique etc., FETs has good isolation between each other, and FETs is allowed to connect.In such technique, according to this
Multiple switch pipe in amplitude limiter circuit in invention can also connect.By taking two switching tubes are connected as an example, according to the present invention
Amplitude limiter circuit it is as shown in Figure 9.Wherein, the second electrode of switching tube 903 is connect with input terminal 101, third electrode and switching tube
905 second electrode connection, the third electrode ground connection of switching tube 905.Here, the on-off of switching tube 903 is mentioned by control unit 904
The control voltage of confession controls, and the on-off of switching tube 905 is controlled by the control voltage that control unit 906 provides.Switching tube is concatenated
Largest benefit is to greatly improve the maximum of amplitude limiter circuit to bear power.For example, single switching transistor physical damage can be born most
Big voltage is if Vmax, then n switching tube series connection, the maximum voltage that ideally physical damage can be born just are increased to n
× Vmax, thus the maximum power that bears of amplitude limiter circuit also improves n2 times.It is according to the present invention another as shown in Fig. 10
A specific embodiment, wherein switching tube 1003 is connected with switching tube 1005, and the first electrode of switching tube 1003 connects resistance
1004, the first electrode of switching tube 1005 connects resistance 1006.Here, the on-off of switching tube 1003 and switching tube 1005 jointly by
The control voltage control that control unit 1007 provides.
In some embodiments, the multiple switch pipe in amplitude limiter circuit according to the present invention can also carry out parallel connection, such as attached
Shown in Figure 11, switching tube 1103 is in parallel with switching tube 1105, and the control that the on-off of switching tube 1103 is provided by control unit 1104
The on-off of voltage control processed, switching tube 1105 is controlled by the control voltage that control unit 1106 provides.With it is above-mentioned include it is multiple that
The amplitude limiter circuit of this concatenated switching tube is similar, and when multiple switch pipe is connected in parallel to each other, the on-off of each switching tube can be by each
From control unit provide control voltage control respectively, the control voltage that can also be provided by same control unit is controlled jointly
System.
In some embodiments, multiple switching tube collection being composed in series by multiple switch pipe can also be connected in parallel to each other, the knot
The parasitic capacitance of single switching transistor first is that multiple switch pipe concentration can be distributed to by the advantages of structure, it is easy to accomplish distributed
Match, improve bandwidth, second is that emphasis can be different the considerations of each pipe collection in the design of multitube collection, to realize more preferably performance.Example
Such as, the series connection number of different pipe collection can be different, and the big pipe collection of series connection number can bear bigger power, but when response recovery
Between it is longer.Although and the power that the small pipe collection of number of connecting is born is smaller, can be restored with quick response.It, will in practical application
The big pipe collection of number of connecting and the small pipe collection of number of connecting are used in parallel, not only can be with quick response, but also can bear high-power.Such as
It is the reality of an amplitude limiter circuit based on switching tube of the above-mentioned multiple technologies of integrated application and structure shown in attached drawing 12
Example, which mainly includes radio frequency signal transmission line 1204, to transmitting radio frequency signal；Control unit 1203, to examine
The watt level of the radiofrequency signal inputted by input terminal 101 is surveyed, corresponding control voltage is then generated and controls first switch tube collection
1201 and second switch collection 1202 on-off.First switch tube collection 1201, when off-state, do not influence signal transmission, shape are connected
Clipping is carried out to input signal when state；Second switch collection 1202, when off-state and first switch tube collection, radio signal transmission
Line 1204 forms LC filter, guarantees input signal low-loss transmission.Further to input when second switch collection 1202 is connected
Signal carries out clipping, reduces clip level.
In some embodiments, 1203 input terminal of described control unit is connected to the input of radio frequency signal transmission line 1204
End, output end is connected to the control terminal of first switch tube collection 1201 and second switch collection 1202, for controlling pipe centralizing switch
The on-off of pipe.Wherein 1201 one end of first switch tube collection is connected to radio frequency signal transmission line 1204, other end ground connection.Second switch
Pipe collection 1202, one end are connected to radio frequency signal transmission line 1204, other end ground connection.
In some embodiments, the radio frequency signal transmission line 1204 between input terminal 101 and output end 102 is mainly by 4 sections
High resistant microstrip line 12041,12042,12043 and 12044 is constituted, and is formed using two thickness metal stacks in silicon technology, width
It is all larger with thickness, RF high power can be born.Transmission line outputs and inputs the pad having for bonding gold wire, pad ruler
Very little 100um × 100um.The width and length for adjusting microstrip line 12041,12042,12043 and 12044 can optimize limiter electricity
The small signal S-parameters on road, to reach design requirement.
In some embodiments, described control unit 1203 mainly include detector diode 12031 and resistance 12032 and
Control port 12033.Wherein 12031 anode of detector diode is connected to the input terminal of radio frequency signal transmission line 1204, and cathode connects
It is connected to the control terminal of resistance 12032 and switching tube collection 1201,1202.Resistance 12,032 1 terminates detector diode negative terminal, the other end
Ground connection.Control port 12033 is drawn from the control port of switching tube collection.When input signal power is smaller, detector diode
12031 are not turned on.When input signal power is greater than certain value, detector diode 12031 is connected, and is used by output voltage signal
In controlling each switching tube on state, to realize Limiting effect.When input signal is restored to normal value, detector diode
12031 disconnect, and by the electric discharge of resistance 12032 to which control terminal voltage declines, switching tube disconnects each switching tube, and output signal is also extensive
Normal value is arrived again.In addition, there are two types of application models for control port 12033, one is can control from external incoming control signal
Switching tube on-off, internal high-power switchgear is controlled by external control signal at this time.Another application model is by the control port
Do not have to vacantly, control signal is generated by internal power detector to control the on-off of high-power switchgear at this time.
In some embodiments, first switch tube collection include the switching tube 12011 being one another in series, 12013,12015,
12017,12019 and the resistance 12010,12012,12014,12016,12018 that is connect respectively with each switching tube first electrode, this
The concatenated form of kind can bear bigger power.It is said it is to be appreciated that only carrying out example here with 5 switching tube series connection
It is bright, and non-limiting switching tube concentrates the number for the switching tube being serially connected, specific number needs to need in practical application as needed
The watt level and small signal S-parameters index request to be born is selected.The resistance 12010 of electrode connection, 12012,
12014,12016,12018 first electrodes for being connected to corresponding switching tube reduce insertion loss to completely cut off radiofrequency signal.In addition,
It is identical that switching tube 12011,12013,12015,12017,12019 is not required for size, according to voltage's distribiuting and can specifically refer to
Mark requires to be designed.Similarly, resistance 12010,12012,12014,12016,12018 does not require size identical yet.
When radiofrequency signal passes through first switch tube collection 1201, if signal voltage amplitude is less than detector diode in control unit 1203
When 12031 conducting voltage, each switching tube is in an off state in switching tube collection 1201, is equivalent to the capacitor for being parallel to ground, is penetrated
Frequency signal passes through；When signal voltage amplitude is greater than the conducting voltage of detector diode 12031 in control unit 1203, switching tube
Each switching tube is in the conductive state in collection 1201, is equivalent to the small resistance for being parallel to ground, and radiofrequency signal passes through switching tube to ground, greatly
The signal power of output is reduced greatly.
In some embodiments, second switch collection 1202 includes switching tube 12021,12023 and 12025, and respectively
The resistance 12020,12022 and 12024 connecting with each switching tube first electrode, each switching tube use and first switch tube collection 1201
In the identical cascaded structure connection of each switching tube.The quantity of second switch centralizing switch pipe can be less than first switch tube collection,
In this way when radiofrequency signal passes through second switch collection, because series connection number is few, power peak can be eliminated with quick response, into
One step reduces clip level.It is to be appreciated that here only to be illustrated with 3 switching tube series connection, and it is non-limiting
The particular number of second switch centralizing switch pipe.
Schematic diagram according to the chip of amplitude limiter circuit disclosed in the present application is as shown in Fig. 13.Preferably, monolithic is long
950um, wide 1650um, show 1301 pressure point of input terminal in figure, the position of 1303 pressure point of 1302 pressure point of output end and control terminal,
There is word indicating on monolithic simultaneously, wherein RFin indicates the input end interface of radiofrequency signal, and RFout identifies the defeated of radiofrequency signal
End interface out, VCTRL indicate control end interface.In addition, there are two types of application models for control terminal 1303, one is can connect from outside
Enter to control Signal-controlled switch pipe on-off, internal high-power switchgear is controlled by external control signal at this time.Another application model
It is not have to the control port vacantly, control signal is generated by internal radio frequency power detector to control high-power switchgear at this time
On-off.
It is as shown in Fig. 14 according to the chip assembling schematic diagram of amplitude limiter circuit disclosed in the present application.Chip can be using conduction
Glue sticking, input terminal 1301, output end 1302 can be connected using spun gold with external microstrip line.Preferably, two can be used
Spun gold connection, and the shorter spun gold length the better.Control terminal 1303 can be connected using spun gold with external microstrip line, can also be direct
It is connected using spun gold with outside control pin.It should be noted that the input terminal of amplitude limiter circuit must be to induction signal when assembly
Transmission direction.
In some embodiments, shown in Figure 15 it is disclosed amplitude limiter circuit according to the present invention, under normal temperature environment, continuous wave
Relation curve when power signal inputs this amplitude limiter circuit between input power Pin and output power Pout.Integrated curved can be with
It is divided into two regions: A, linear zone.In the region, input signal power Pin is smaller, output signal power Pout and input letter
Number power P in is almost the same, and signal is almost without damply passing through；B, clipping area.In the region, input signal power Pin is higher than
Threshold level, i.e., when greater than about 13dBm, output signal power Pout starts to decay, then as input signal power Pin increases
Greatly, output signal power Pout is substantially in the safe range of design.From test result as can be seen that working as input signal power
When Pin is less than or equal to 43dBm, the maximum leakage level of amplitude limiter circuit disclosed in the present application is less than 15dBm.
In some embodiments, radio receiver disclosed in the present application includes the amplitude limiter circuit in above-described embodiment, nothing
The structure of line reception device is using the wireless receiving commonly used in the prior art that can be realized to input radio frequency signal progress clipping
Device mainly includes the parts such as reception device front end, demodulator, limiter and crust of the device.Wherein, wireless receiving fills
Limiter in setting is reduced by using power of the amplitude limiter circuit disclosed in the present application to the radiofrequency signal received, is avoided
Low noise in receiver is burned out, to realize the protection to wireless signal receiver.It is to be appreciated that here only with packet
The radio receiver for including amplitude limiter circuit disclosed in the present application is illustrated, and non-limiting radio receiver is specific
Structure and application environment, the specific structure and parameter of radio receiver can be selected and be adjusted according to actual needs.
Disclosed herein as well is some embodiments, specifically:
Embodiment 1 may include a kind of amplitude limiter circuit, the circuit include: signal input part, signal output end, at least one
Switching tube and at least one control unit；
At least one described control unit is used to control the conducting and disconnection of at least one switching tube；
At least one described switching tube holds the power of received radiofrequency signal to subtract for inputting a signal into the on-state
It is exported after weak by signal output end.
Embodiment 2 may include circuit described in embodiment 1, and the amplitude limiter circuit further includes and at least one described switch
At least one corresponding resistance of each switching tube in pipe, the first electrode of the switching tube connect the first of corresponding resistance
The second end at end, the resistance connects described control unit.
Embodiment 3 may include circuit described in embodiment 1 or 2, and the amplitude limiter circuit includes a switching tube, wherein
The first electrode of the switching tube connects described control unit, the second electrode of the switching tube connect the signal input part and
The signal output end, the third electrode ground connection of the switching tube.
Embodiment 4 may include circuit described in any one of embodiment 1 to 3, and the amplitude limiter circuit includes at least two
Switching tube, at least two switching tube are parallel with one another.
Embodiment 5 may include circuit described in any one of embodiment 1 to 4, the second of at least two switching tube
Electrode is connect with the signal input part and the signal output end, the third electrode ground connection of at least two switching tube.
Embodiment 6 may include circuit described in any one of embodiment 1 to 5, and the first of at least two switching tube
Electrode is connect with two control units respectively.
Embodiment 7 may include circuit described in any one of embodiment 1 to 5, and the first of at least two switching tube
Electrode connects same control unit.
Embodiment 8 may include circuit described in any one of embodiment 1 to 3, and the amplitude limiter circuit includes at least two
Switching tube, at least two switching tube are serially connected.
Embodiment 9 may include circuit described in embodiment 8, and of the first switch tube at least two switching tube
Two electrodes are connect with the signal input part and the signal output end, the second switch at least two switching tube
Third electrode ground connection.
Embodiment 10 may include circuit described in embodiment 8 or 9, the first electrode difference of at least two switching tube
It is connect with two control units.
Embodiment 11 may include circuit described in embodiment 8 or 9, the first electrode connection of at least two switching tube
Same control unit.
Embodiment 12 may include circuit described in any one of embodiment 1 to 11, and the amplitude limiter circuit includes mutually simultaneously
The first switch tube collection and second switch collection of connection；
The first switch tube collection includes at least two switching tubes being serially connected, and the second switch collection includes at least
Two switching tubes being serially connected.
Embodiment 13 may include circuit described in any one of embodiment 1 to 12, and the one of the first switch tube concentration
The second electrode of a switching tube connects the signal input part and signal output end, and the connection of third electrode is concatenated with the switching tube
The second electrode of switching tube.
Embodiment 14 may include circuit described in any one of embodiment 1 to 12, and the one of the first switch tube concentration
The third electrode of a switching tube is grounded, the third electrode of second electrode connection and the concatenated switching tube of the switching tube.
Embodiment 15 may include circuit described in any one of embodiment 1 to 12, and the one of the second switch concentration
The second electrode of a switching tube connects the signal input part and signal output end, and the connection of third electrode is concatenated with the switching tube
The second electrode of switching tube.
Embodiment 16 may include circuit described in any one of embodiment 1 to 12, and the one of the second switch concentration
The third electrode of a switching tube is grounded, the third electrode of second electrode connection and the concatenated switching tube of the switching tube.
Embodiment 17 may include circuit described in any one of embodiment 1 to 16, the first switch tube collection and second
The first electrode of different switching tubes included by switching tube collection connects same control unit.
Embodiment 18 may include circuit described in any one of embodiment 1 to 16, the first switch tube collection and second
The first electrode of different switching tubes included by switching tube collection connects different control units.
Embodiment 19 may include circuit described in any one of embodiment 1 to 18, and described control unit is voltage source.
Embodiment 20 may include circuit described in any one of embodiment 1 to 18, and described control unit is power detection
Device.
Embodiment 21 may include circuit described in embodiment 20, and the power detector can be according to the letter of detection
The power of number input terminal, generates corresponding DC voltage to control the conducting and disconnection of the switching tube.
Embodiment 22 may include circuit described in any one of embodiment 1 to 21, and the switching tube is field effect transistor
Pipe.
Embodiment 23 may include a kind of radio receiver, which includes any one of embodiment 1 to 22 institute
The amplitude limiter circuit stated.
The embodiment of the present invention is elaborated above in conjunction with attached drawing, but the present invention is not limited to above-described embodiment,
Within the knowledge of a person skilled in the art, it is made under the premise of not departing from present inventive concept and spirit
Various change should all belong to the covering scope of the invention patent.
In the accompanying drawings, some structure or method features can be shown with specific arrangements and/or sequence.It should be appreciated, however, that
It may not be needed such specific arrangements and/or sequence.But in some embodiments, these features can be to be different from saying
Bright property mode shown in the drawings and/or sequence are arranged.In addition, including that structure or method feature is not intended in specific pattern
Imply and require such feature in all embodiments, and in some embodiments, can not include these features or
Person can combine with other features.
It should be noted that in example and specification of the invention, relational terms such as first and second and the like
It is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying these
There are any actual relationship or orders between entity or operation.Moreover, the terms "include", "comprise" or its is any
Other variants are intended to non-exclusive inclusion, so that including the process, method, article or equipment of a series of elements
Include not only those elements, but also including other elements that are not explicitly listed, or further includes for this process, side
Method, article or the intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence " including one " limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
Although being shown and described to the application by referring to certain preferred embodiments of the application, this
The those of ordinary skill in field should be understood that can to it, various changes can be made in the form and details, without departing from the application
Spirit and scope.
Claims (23)
1. a kind of amplitude limiter circuit characterized by comprising signal input part, signal output end, at least one switching tube and at least
One control unit；
At least one described control unit is used to control the conducting and disconnection of at least one switching tube；
After at least one described switching tube is used to input a signal into the powered down for holding received radiofrequency signal in the on-state
It is exported by signal output end.
2. circuit according to claim 1, which is characterized in that the amplitude limiter circuit further include and it is described at least one switch
At least one corresponding resistance of each switching tube in pipe, the first electrode of the switching tube connect the first of corresponding resistance
The second end at end, the resistance connects described control unit.
3. circuit according to claim 1, which is characterized in that the amplitude limiter circuit includes a switching tube, wherein described
The first electrode of switching tube connects described control unit, and the second electrode of the switching tube connects the signal input part and described
Signal output end, the third electrode ground connection of the switching tube.
4. circuit according to claim 1, which is characterized in that the amplitude limiter circuit includes at least two switching tubes, described
At least two switching tubes are parallel with one another.
5. circuit according to claim 4, which is characterized in that the second electrode of at least two switching tube and the letter
Number input terminal is connected with the signal output end, the third electrode ground connection of at least two switching tube.
6. circuit according to claim 5, which is characterized in that the first electrode of at least two switching tube is respectively with two
A control unit connection.
7. circuit according to claim 5, which is characterized in that the first electrode connection of at least two switching tube is same
Control unit.
8. circuit according to claim 1, which is characterized in that the amplitude limiter circuit includes at least two switching tubes, described
At least two switching tubes are serially connected.
9. circuit according to claim 8, which is characterized in that of the first switch tube at least two switching tube
Two electrodes are connect with the signal input part and the signal output end, the second switch at least two switching tube
Third electrode ground connection.
10. circuit according to claim 9, which is characterized in that the first electrode of at least two switching tube respectively with
Two control unit connections.
11. circuit according to claim 9, which is characterized in that the first electrode connection of at least two switching tube is same
One control unit.
12. circuit according to claim 1, which is characterized in that the amplitude limiter circuit includes first switch parallel with one another
Pipe collection and second switch collection；
The first switch tube collection includes at least two switching tubes being serially connected, and the second switch collection includes at least two
The switching tube being serially connected.
13. circuit according to claim 12, which is characterized in that the of the switching tube that the first switch tube is concentrated
Two electrodes connect the signal input part and signal output end, third electrode connection and the second of the concatenated switching tube of the switching tube
Electrode.
14. circuit according to claim 12, which is characterized in that the of the switching tube that the first switch tube is concentrated
Three electrodes ground connection, the third electrode of second electrode connection and the concatenated switching tube of the switching tube.
15. circuit according to claim 12, which is characterized in that the of the switching tube that the second switch is concentrated
Two electrodes connect the signal input part and signal output end, third electrode connection and the second of the concatenated switching tube of the switching tube
Electrode.
16. circuit according to claim 12, which is characterized in that the of the switching tube that the second switch is concentrated
Three electrodes ground connection, the third electrode of second electrode connection and the concatenated switching tube of the switching tube.
17. circuit according to claim 12, which is characterized in that the first switch tube collection and second switch collection are wrapped
The first electrode of the different switching tubes included connects same control unit.
18. circuit according to claim 12, which is characterized in that the first switch tube collection and second switch collection are wrapped
The first electrode of the different switching tubes included connects different control units.
19. circuit according to claim 1, which is characterized in that described control unit is voltage source.
20. circuit according to claim 1, which is characterized in that described control unit is power detector.
21. circuit according to claim 20, which is characterized in that the power detector can be according to the letter of detection
The power of number input terminal, generates corresponding DC voltage to control the conducting and disconnection of the switching tube.
22. circuit according to claim 1, which is characterized in that the switching tube is field effect transistor.
23. a kind of radio receiver, which is characterized in that including amplitude limiter circuit described in any one of claim 1 to 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910728876.0A CN110350891A (en) | 2019-08-08 | 2019-08-08 | A kind of amplitude limiter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910728876.0A CN110350891A (en) | 2019-08-08 | 2019-08-08 | A kind of amplitude limiter circuit |
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| CN110350891A true CN110350891A (en) | 2019-10-18 |
Family
ID=68184323
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910728876.0A Pending CN110350891A (en) | 2019-08-08 | 2019-08-08 | A kind of amplitude limiter circuit |
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| CN (1) | CN110350891A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117118377A (en) * | 2023-10-23 | 2023-11-24 | 上海安其威微电子科技有限公司 | Amplitude limiting circuit and radio frequency chip |
| CN117176098A (en) * | 2023-11-01 | 2023-12-05 | 上海安其威微电子科技有限公司 | Amplitude limiting circuit and wireless transceiver |
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| CN117118377A (en) * | 2023-10-23 | 2023-11-24 | 上海安其威微电子科技有限公司 | Amplitude limiting circuit and radio frequency chip |
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